A particle is moving in a circular path of radius r.

Question:

A particle is moving in a circular path of radius $r$. The displacement after half a circle would be :

(a) Zero

(b) $\pi r$

(c) $2 r$

(d) $2 \pi r .$

Solution:

(c) Explanation : Particle is just opposite to the initial position on the circle.

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